Plz answer them I need answers ASAP

4. 13.04m/s²

5. 4x10^11m/s²

6. –3m/s²

Explanation:

Acceleration is defined as rate of change of velocity with time. Mathematically it is represented as:

a = (v – u)/t

a is the acceleration.

v is the final velocity.

u is the initial velocity.

t is the time

With the above formula, we can obtain the acceleration of each question.

4. Determination of the acceleration of the spacecraft.

Data obtained from the question include the following:

Initial velocity (u) = 0

Final velocity (v) = 67.8m/s

Time (t) = 5.2secs

Acceleration (a) =..?

a = (v – u)/t

a = (67.8 – 0)/5.2

a = 13.04m/s²

Therefore, the acceleration of the spacecraft is 13.04m/s².

5. Determination of the acceleration of the electron.

Data obtained from the question include the following:

Initial velocity (u) = 0

Final velocity (v) = 2.6x10^5m/s

Time (t) = 6.5x10^-7secs

Acceleration (a) =..?

a = (v – u)/t

a = (2.6x10^5 – 0)/ 6.5x10^-7

a = 4x10^11m/s²

Therefore, the acceleration of the electron is 4x10^11m/s².

6. Determination of the acceleration of the truck.

Data obtained from the question include the following:

Initial velocity (u) = 20m/s

Final velocity (v) = 5m/s

Time (t) = 5secs

Acceleration (a) =..?

a = (v – u)/t

a = (5 – 20)/5

a = –15/5

a = –3m/s².

Therefore, the acceleration of the truck is –3m/s².

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.